AD1851/AD1861
REV. A
–4–
ABSOLUTE MAXIMUM RATINGS*
VL to DGND . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 V to 6.50 V
VS to AGND . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 V to 6.50 V
–VS to AGND . . . . . . . . . . . . . . . . . . . . . . . . . –6.50 V to 0 V
Digital Inputs to DGND . . . . . . . . . . . . . . . . . . . –0.3 V to VL
AGND to DGND . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±0.3 V
Short Circuit . . . . . . . . . . . . . . . . . Indefinite Short to Ground
Soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300
°C, 10 sec
Storage Temperature . . . . . . . . . . . . . . . . . . –60
°C to +100°C
*Stresses greater than those listed under “Absolute Maximum Ratings” may cause
permanent damage to the device. This is a stress rating only and functional
operation of the device at these or any other conditions above those indicated in the
operational section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
PIN DESCRIPTIONS
1–VS
Analog Negative Power Supply
2
DGND
Logic Ground
3VL
Logic Positive Power Supply
4
NC
No Connection
5
CLK
Clock Input
6
LE
Latch Enable Input
7
DATA
Serial Data Input
8
NC
No Internal Connection*
9VOUT
Voltage Output
10
RF
Feedback Resistor
11
SJ
Summing Junction
12
AGND
Analog Ground
13
IOUT
Current Output
14
MSB ADJ
MSB Adjustment Terminal
15
TRIM
MSB Trimming Potentiometer Terminal
16
VS
Analog Positive Power Supply
*Pin 8 has no internal connection; -VL from AD1856 or AD1860 socket can be
safely applied.
ORDERING GUIDE
Package
Model
Resolution
THD + N
Option*
AD1851N
16 Bits
0.008%
N-16
AD1851N-J
16 Bits
0.004%
N-16
AD1851R
16 Bits
0.008%
R-16
AD1851R-J
16 Bits
0.004%
R-16
AD1861N
18 Bits
0.008%
N-16
AD1861N-J
18 Bits
0.004%
N-16
AD1861R
18 Bits
0.008%
R-16
AD1861R-J
18 Bits
0.004%
R-16
*N = Plastic DIP Package; R = Small Outline (SOIC) Package.
CAUTION
ESD (electrostatic discharge) sensitive device. The digital control inputs are diode protected;
however, permanent damage may occur on unconnected devices subject to high energy electro-
static fields. Unused devices must be stored in conductive foam or shunts. The protective foam
should be discharged to the destination socket before devices are inserted .
WARNING!
ESD SENSITIVE DEVICE
Typical Performance
175
150
125
100
75
50
25
2
4
6
8
10
12
14
CLOCK FREQUENCY – MHz
PD
–
mW
Power Dissipation vs. Clock Frequency
THD+N
–
%
10
1
0.1
0.01
0.001
–30 –20 –10
0
10
20
30
40
50
60
70
80
90
TEMPERATURE –
°C
–60dB
–20dB
0dB
THD vs. Temperature